When can you cross-side tune the other RTU?

Cross-side tuning allows you to control the communication and navigation radios of the other Radio Tuning Unit (RTU) in a multi-RTU setup. The correct answer indicates that this can be accomplished by pressing the 1/2 button on the RTU. This button facilitates the switching between RTUs, enabling the operator to tune the other unit’s frequencies without the need for direct physical interaction or other limitations.

This capability is beneficial for enhancing operational efficiency, particularly during dynamic phases of flight or when immediate adjustments are necessary for communication or navigation. Understanding this function is crucial for pilots and operators, as it streamlines the process of managing radio communications across multiple systems, thereby improving situational awareness and response times in various scenarios.